One of the most requested features in earlier versions was better transport property predictions. REFPROP 9 incorporated the latest correlation models for the viscosity and thermal conductivity of refrigerant mixtures, including the effect of critical enhancement (the anomalous increase in properties near the critical point).
| Feature | REFPROP 9 (Legacy) | REFPROP 10 / 10.0 (Current) | | :--- | :--- | :--- | | | ~147 | 200+ (including carbon capture solvents and new low-GWP refrigerants) | | Mixture Model | GERG-2008 (excellent for natural gas) | GERG-2012 (improved for CO2-rich mixtures) | | Transport Properties | Stable, mature correlations | Novel models for ionic liquids and nanorefrigerants | | User Interface | Classic, simple Windows GUI | Modernized with live plotting and tabular exports | | Programming | 32-bit and 64-bit DLL | 64-bit only; Python wrappers improved | | License Cost | No longer for sale (legacy users only) | Active sales; academic discounts available | nist refprop 9
The primary reference for (Reference Fluid Properties) is the user guide authored by Eric W. Lemmon and colleagues at the National Institute of Standards and Technology. Primary Reference One of the most requested features in earlier
Unlike many academic calculators, REFPROP 9 was designed for integration. It includes: Lemmon and colleagues at the National Institute of
: Includes 105 to 121 pure fluids , covering HFCs, CFCs, "natural" refrigerants (like ammonia and CO2), hydrocarbons, cryogens (like helium and nitrogen), and water.
Used for complex mixture calculations to account for departures from ideal mixing. Engineering and Research Applications